Combination drill and brush



D. D. PuRVIs- COMBINATION DRILL AND BRUSH Filed Jan 29. 1947 INVENTORV Barnum D. Purvis BY Q v I ATTORNEYS.

Patented Oct. 25, 1949 COMBINATION DRILL AND BRUSH Damon D. Purvis, Jacksonville, Fla., assignor of one-half to Carl D. Langston Application January 29, 1947, Serial No. 725,011

4 Claims. 1 V

This invention relates to combination tools and cleaners, and more specifically to a combination drill and brush.

In drilling holes, the material removed by the drill may accumulate around the hole and, if a lubricant is employed to assist in drilling, a portion of this, too, may deposit about the mouth area of the hole. Both the material and the deposit of lubricant generally must be removed and the area burnished before subsequent operations (as riveting) are undertaken. It is common practice to drill and then, after removing the drill, to wipe or brush the surface, adacent the drilled hole, to remove material (chips) and lubricant and burnish the surface, thus entailing two operations.-

An important object of the invention is to provide a novel combination drill and brush or cleaner which will remove chips and the like as well as lubricant from the mouth area of the hole and burnish this area, at the same time that the hole is bein completed.

Another important object is to provide a brush having a hollow stem portion adapted to receive a portion of a drill so disposed that the drill point will extend from one end of the hollow stem portion of the brush and the other portion (shank) of the drill from the opposite end of the hollow stem portion.

Still another object is to provide a brush having a hollow stem portion and means to adjustably position the brush alongthe drill.

Yet another object is to provide a brush having a portion adapted to receive drill shanks of various sizes.

Other objects and advantages of the invention will be apparent during the following detailed description of the invention, taken in connection with the accompanying drawing, forming a part of this specification, and in which drawing:

Figure 1 is an elevation of the combination and cleaner.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of the invention and wherein similar reference characters designate corresponding parts throughout and cleaner is designated as A, the tool as B and the cleaner carried thereby as C. A workpiece being drilled is designated as D.

Preferably, the combination tool and cleaner A is wholly of metal, although other suitable material or materials may be employed.

The tool B is shown as a means constructed and arranged to remove material from below the surface of a workpiece, and is illustrated as a conventional drill, having a pointed end 5, a helically grooved portion 6 leading therefrom to a stem or shank portion 1.

As for the cleaner C, this is shown as a brush having bristles ill, and a body preferably comprising a bristle-holding head portion ii, an intermediate portion 42 extending from the end thereof opposite from the end from which the bristles protrude, being, preferably, of somewhat reduced width over the width of the portion H, and a stem portion [3 extending from the portion [2 and being of less width than the width of the intermediate portion l2, so that a shoulder M is provided at the juncture of the portions I2 and I 3. Extending through the portions ll, l2 and 3 is a drill stem-accommodating opening or bore 15. Because of this bore It, the bristles do not extend to the longitudinal axis of the cleaner 0 and form an opening, from their outer ends It to the bristle-holding head portion H, where the opening is, of course, continued as the bore l5. However, the bristles extend close to the inserted drill, as is apparent in Figure 2.

Preferably, the bristles in are of wire and should be stiff.

A suitable means i! is provided to secure the tool B to the cleaner C, preferably in a detachable connection. This may comprise a set screw It, with its screw-threaded shank l9 extending radially through the wall of one of the portions, preferably the portion 12, with this portion provided with a screw-threaded bore from its outer face to the longitudinal bore l5. The free, inner end of the set screw 18, is, of course, adapted to frictionally contact the shank portion 1 of the drill.

In the case of drills having long stems, the operator may attach the combination tool to the drill press chuck by either the stem protruding from the end of the portion l3, or, if the lit of the drill stem and wall of the bore [5 is a snug one, he may attach the portion l3 to the chuck, with the ends of the jaws of the latter abutting the shoulder I4.

Obviously, with the means I! provided, a drill the several views, the novel combination tool may be replaced by another (either by a sharp 3 drill or a drill adapted to bore a larger hole or one adapted to bore a smaller hole) and the extent the helically-grooved portion 6 extends beyond the ends l6 of the bristles It) may be adjusted.

With the use of the novel tool A, the hole may be bored and the mouth area adjacent the hole cleaned and burnished in one operation. It is also now obvious that carelessness on the part of the burnisher (following the driller) who may fail to burnish the area or areas adjacent one or more of a large number of drilled holes, will be avoided since, with the use of the novel combination tool herein disclosed, every hole drilled will have its mouth area cleaned and burnished ready for the next operation (such as riveting).

While a conventional drill is shown as the tool, it is obvious that the same may be a reamer.

Various changes may be made to the form of the invention herein shown and described without departing from the spirit of the invention or scope of the claims.

What is claimed is:

1. In a tool, means for drilling a hole in a workpiece and causing the material removed from the hole to move to the surface of the workpiece, including a drill having a grooved portion and a shank portion, and means carried by said first means to clean said material from said surface adjacent said hole after said material reaches said surface including a brush having a body and bristles with said grooved portion extending outwardly of said bristles and said body secured to said shank portion.

2. In a tool, means for drilling a hole in a workpiece and causing the material removed from the hole to move to the surface of the workpiece, including a drill having a grooved portion and a shank portion, and means carried by said first means to clean said material from said surface adjacent said hole after said material reaches said surface and burnish said surface adjacent said 4 hole including a brush having a body and stiff bristles with said grooved portion extending outwardly of said bristles and said body secured to said shank portion.

3. In a tool, means for drilling a hole in a workpiece and causing the material removed from the hole to move to the surface of the workpiece, including a drill having a grooved portion and a shank portion, means to clean said material from said surface adjacent said hole after said material reaches said surface, including a brush having a body provided with a longitudinal bore and a portion having an outwardly-extending, chuck jawsabuttin shoulder, and bristles extending from said body, surrounding at least a part of said grooved portion, with said shank portion extending into said bore, and means to detachably secure said shank portion to said body.

4. In a tool part, a body including a head portion, an intermediate portion extending therefrom, with one of said portions being of greater diameter than the other, whereby a chuck jawsabutting shoulder is provided, a drill shank-accommodating stem portion extending from the intermediate portion, and a longitudinal opening extending through said head and intermediate portions and into said stem portion, and bristles carried by said head portion and extending therefrom in a direction opposite to the direction in which said stem portion extends from said intermediate portion, said bristles falling short of the axial center of said head.

DAMON D. PURVIS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,421,647 Peterson June 3, 1947 2,437,364 Smith Mar. 9, 1948 

